Safety-clamp for calender-rolls.



IN'SZENI DE."

3 0 9 1 6n 1 E N U u D E T N E T A P R 2 2 1 1 .3 7 m N SAFETY CLAMP FOR GALENDER ROLLS.

APPLICATION FILED JUNE 30. 1902.

H0 MODEL.

W'ITNESEEE 664.7%

HENRY A. OWEN, OF WI-IITINSVILLE,

WVHITIN MACHINE IVORKS, INCORPORATED, OF WHITINSVILLE,

SAOHUSETTS.

SAFETY-CLAMP FOR Patented Tune 16, 1903.

PATENT GFFICE.

MASSACHUSETTS, ASSIGNOR TO THE 'MAS- .QALENDER-ROLLS.

SPECIFICATION forming part of Letters Patent No. 731,122, dated June 16, 1903.

Application filed June 30, 1902. Serial No. 113,796. (No model) To all whom it may concern:

Be it known that I, HENRY A. OWEN, a citi zen of the United States, residing at Whitinsville, in thecounty of Worcester and State of Massachusetts, have invented a new and useful Improvement in Safety-Clamps for Calender-Rolls, of which the following is a specification.

The calender-rolls of the drawing-frames and railway-heads, used in preparing textile fiber, calender-rolls for drawing out metal, and rolls used for compressing material have usually one of the rolls held by a yielding spring-pressure to allow for slight variations in the thickness of the material operated upon. When in these machines the material supplied exceeds the normal capacity of the calender-rolls, the rollsare forced apart, and the top roll is liable to be forced so hard against the spring-support that it becomes difficult and requires considerable time to remove the accumulated material and release the top roll.

The object of this invention is to automatically release the. top roll when an excessive thickness of material enters between the rolls; and to this end the invention consists in the peculiar and novel construction of the retaining-clamp whereby the top roll may be automatically released, as will be more fully set forth hereinafter.

v Figure l is a front elevation showing two calender-rolls, one of which-is driven, mounted in journal-bearings. Fig. 2 is an end View of the journal-bearings of two calender-rolls, showing one of myimproved clamps. Fig. 3 is a vertical sectional view of one of my improved clamps, showing the spring-pressed post and the abutment on the same. .Fig. 4 is a horizontal sectional view of one of the clamps, showing the pivoted hooks and the abutment against which one of the hooks bears.

Similar marks of reference indicate corresponding parts in all the figures.

In the drawings, ct indicates the driven ro-ll, journaled in the end bearings a a and provided with the gear a The top roll b is journaled in the U-shaped bearings 19' I), having the sliding bolsters 12 b bearing on the top of the journal of the top roll. The top roll b may rest on the driven roll a or may be separated fi'om the same by the material passing between the two rolls.

The journal-bearing b is provided at the opposite sides with the outwardly-projecting ribs 17 19 with which the hooks c and c of the clamp c engage. The hook c is integral with the body of the clamp 0, while the hook c is pivotally secured to the bracket 0 extending from the body ofthe clam-p c.' The bodyof the clampc has 'the cylindrical chamber c and the channel 0 extending transversely across the center of the lower end of the chamberc Theinternally-screw-threaded sleeve 0 provided with arms 0 0 may slide in the chamber 0 and is held against rotation by the arms 0 0 which may slide in the sleeve in the transverse channel 0 The coiled spring a in the chamber 0 bears on the end of the sleeve 0 The screw-post 0 extends through the upper end of the clamp-body with a sliding fit, is in screwthread engagement with the sleeve 0, extends through the stop-plate 0 by which the lower end of the chamber 0 and the transverse channel 0 are closed, and bears at its end on the bolster b.

In the normal condition the end of the arm o of the pivoted hook c bears against the projecting end of the arm 01 The coiled spring 0 exerts pressure through the sleeve 0 and the screw-post c on the bolster b and thereby exerts a yielding spring-pressure on the roll b. When the normal thickness of material to be calendered or drawn out passes between the rolls CL and b, the top roll may yield to the usual variations in the thickness of the material and the end of the arm o mayrise with the sleeve 0 against the pressure of the spring 0 within the desired limits in contact with the end of the arm 0 on the pivoted hook 0 When, however, a greaterquantity of material than the rolls are constructed to control is passed to the same,.then the raising of the top roll I) to the position indicated inbroken lines in Fig. 2 carries the arm c above the end of the arm 0 normally in contact with the projecting end of the arm 0 and causes the arm 0 and book 0 to swing on the pivot and disengage the hook from the rib b thereby releasing the clamp and permitting the ready clearing of the rolls and the readjustment of the clamp with little loss of time or reduction in the product of the machine.

I do not Wish to confine myself to the exact construction of the parts herein shown and described, as these may be altered to conform to modified conditions without materially affecting the beneficial results of my invention.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a device for exerting pressure on the journal of a calender-roll, the combination with a member moving with the journal, of a pivoted arm bearing normally on the memher, and means for releasing the pressure on the journal when the same is forced beyond the predetermined point, as described.

2. In a safety-clamp for calender-rolls, the combination with the journal-bearings of the rolls, the clampbody, connections of the clamp-body with thejournal-bearing, and the means for exerting pressure on the journalbearing, of the arm 0 connected with the pressure-exerting device, and adapted to release the clamp, as described.

3. In a safety-clamp for calender-rolls, the combination with the clamp-body and the pressure-exerting mechanism in the same, of

an arm connecting one side of the clampbody with the journal-bearing, a pivoted arm connecting the other side of the clamp-body with the journal-bearing, and a sliding member on the pressure-exerting device forming a bearing for the pivoted arm, as described.

4. In a safety-clamp for calender-rolls, the combination with the clamp-body c, the hook c and the book 0 pivotally secured to the clamp-body c, of the spring-pressed sleeve 0 and the arm forming an abutment for the pivoted hooked arm, as described.

5. In a safety-clamp for calender-rolls, the combination with the journal-bearing b, the ribs 19 on the same, and the holster 6 of the clamp-body c, the hook c and the book 0 the latter being pivotally secured to the clampbody, the screw-post c, the sleeve 0 adjustably connected with the screw-post, the arm 0 on the sleeve, and the coiled spring 0 arranged to operate, as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HENRY A. OWEN.

Witnesses:

ADA E. HAGERTY, J. A. MILLER, Jr. 

